42 lines
1.7 KiB
JavaScript
42 lines
1.7 KiB
JavaScript
import { parser } from '@lezer/cpp';
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import { LRLanguage, indentNodeProp, continuedIndent, flatIndent, delimitedIndent, foldNodeProp, foldInside, LanguageSupport } from '@codemirror/language';
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/**
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A language provider based on the [Lezer C++
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parser](https://github.com/lezer-parser/cpp), extended with
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highlighting and indentation information.
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*/
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const cppLanguage = /*@__PURE__*/LRLanguage.define({
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name: "cpp",
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parser: /*@__PURE__*/parser.configure({
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props: [
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/*@__PURE__*/indentNodeProp.add({
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IfStatement: /*@__PURE__*/continuedIndent({ except: /^\s*({|else\b)/ }),
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TryStatement: /*@__PURE__*/continuedIndent({ except: /^\s*({|catch)\b/ }),
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LabeledStatement: flatIndent,
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CaseStatement: context => context.baseIndent + context.unit,
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BlockComment: () => null,
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CompoundStatement: /*@__PURE__*/delimitedIndent({ closing: "}" }),
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Statement: /*@__PURE__*/continuedIndent({ except: /^{/ })
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}),
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/*@__PURE__*/foldNodeProp.add({
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"DeclarationList CompoundStatement EnumeratorList FieldDeclarationList InitializerList": foldInside,
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BlockComment(tree) { return { from: tree.from + 2, to: tree.to - 2 }; }
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})
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]
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}),
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languageData: {
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commentTokens: { line: "//", block: { open: "/*", close: "*/" } },
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indentOnInput: /^\s*(?:case |default:|\{|\})$/,
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closeBrackets: { stringPrefixes: ["L", "u", "U", "u8", "LR", "UR", "uR", "u8R", "R"] }
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}
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});
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/**
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Language support for C++.
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*/
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function cpp() {
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return new LanguageSupport(cppLanguage);
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}
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export { cpp, cppLanguage };
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